Patents by Inventor Ephraim A. Cuevas

Ephraim A. Cuevas has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Solution mining water soluble salts at high temperatures
    Patent number: 4232902
    Abstract: Subterranean formations of water soluble salt deposits are solution mined by introducing into the formation an aqueous solvent having a temperature substantially above the temperature of the deposit thereby heating the deposit and dissolving the soluble salts, and withdrawing from the deposit an aqueous solution enriched in the dissolved salts. An aqueous solvent having a temperature lower than the temperature of the first solvent is subsequently introduced into the deposit thereby recapturing heat given up to the deposit and dissolving the soluble salt utilizing greater solubility characteristics of the soluble salts owing to the increased deposit temperature, and withdrawing from the deposit a substantially increased amount of dissolved salt.
    Type: Grant
    Filed: February 9, 1979
    Date of Patent: November 11, 1980
    Assignee: PPG Industries, Inc.
    Inventor: Ephraim A. Cuevas